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/* -*- c++ -*- */
/*
* Copyright 2015 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#include "ldpc_par_mtrx_encoder_impl.h"
#include <volk/volk.h>
#include <boost/assign/list_of.hpp>
#include <algorithm> // for std::reverse
#include <cmath>
#include <cstdio>
#include <cstring> // for memcpy
#include <sstream>
#include <vector>
namespace gr {
namespace fec {
namespace code {
generic_encoder::sptr ldpc_par_mtrx_encoder::make(std::string alist_file,
unsigned int gap)
{
code::ldpc_H_matrix::sptr H_obj = code::ldpc_H_matrix::make(alist_file, gap);
return make_H(H_obj);
}
generic_encoder::sptr ldpc_par_mtrx_encoder::make_H(const code::ldpc_H_matrix::sptr H_obj)
{
return generic_encoder::sptr(new ldpc_par_mtrx_encoder_impl(H_obj));
}
ldpc_par_mtrx_encoder_impl::ldpc_par_mtrx_encoder_impl(
const code::ldpc_H_matrix::sptr H_obj)
: generic_encoder("ldpc_par_mtrx_encoder")
{
// LDPC parity check matrix to use for encoding
d_H = H_obj;
d_rate = static_cast<double>(d_H->n()) / static_cast<double>(d_H->k());
// Set frame size to k, the # of bits in the information word
// All buffers and settings will be based on this value.
set_frame_size(d_H->k());
}
ldpc_par_mtrx_encoder_impl::~ldpc_par_mtrx_encoder_impl() {}
int ldpc_par_mtrx_encoder_impl::get_output_size()
{
// return outputSize;
return d_output_size;
}
int ldpc_par_mtrx_encoder_impl::get_input_size()
{
// return inputSize;
return d_frame_size;
}
bool ldpc_par_mtrx_encoder_impl::set_frame_size(unsigned int frame_size)
{
bool ret = true;
if (frame_size % d_H->k() != 0) {
GR_LOG_ERROR(d_logger,
boost::format("Frame size (%1% bits) must be a "
"multiple of the information word "
"size of the LDPC matrix (%2%).") %
frame_size % (d_H->k()));
throw std::runtime_error("ldpc_par_mtrx_encoder: cannot use frame size.");
}
d_frame_size = frame_size;
d_output_size = static_cast<int>(d_rate * d_frame_size);
return ret;
}
double ldpc_par_mtrx_encoder_impl::rate() { return d_rate; }
void ldpc_par_mtrx_encoder_impl::generic_work(void* inbuffer, void* outbuffer)
{
// Populate the information word
const unsigned char* in = (const unsigned char*)inbuffer;
unsigned char* out = (unsigned char*)outbuffer;
int j = 0;
for (int i = 0; i < get_input_size(); i += d_H->k()) {
d_H->encode(&out[j], &in[i]);
j += d_H->n();
}
}
} /* namespace code */
} /* namespace fec */
} /* namespace gr */
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